Railway-car-axle bearing



Aug. 26, 1930. w. L. SCRIBNER RAILWAY CAR AXLE BEARING Filed Sept. 8,1928 standard axle, my

Patented Aug. 26, 1930 UNITED STATES WILLIAM L. SCRIBNER, OF CANTON,OHIO,

ASSIGNOR TO THE TIMKEN ROLLER BEAR- ING COMPANY, 01E CANTON, OHIO, AOOBPORATION OF OHIO RAILWAY-CAR-AXLE BEARING Application filed SeptemberMy invention relates to railway car axle bearings and has for itsprincipal object a construction provided with antifriction bearings andwhich is interchangeable with present railway car axles using plainbearings.

The invention consists principally in tapering the end portion of arailway car axle and mounting'roller bearings thereon, the outermost orlarger roller bearing being located closer to the vertical center lineof the radial load than is the inner or smaller roller bearing. Theinvention further consists in the railway car axle bearing and in theparts and combinations of parts hereinafter described and claimed.

In the accompanying drawing, Fig. 1 is a vertical sectional view ofa'railway car axle construction embodying my invention; and

Fig. 2 is'a comparative view of the end portions of my improved axle andan A. R. A. axle being shown in full lines andthe A. R. A. standard axlein dotted lines.

'The drawing illustrates a journal box 1 conforming-to the A.

truck side frame. The outer end of said journal box is provided with acover plate 3 7 seat. Said tapered portion 6 is of suflici'ent width toaccommodate an annular closure member 9 that .is provided with a flange10 which is secured to the inner end of the housing by screws 11.

To make more room for roller bearings, the

axle is again reduced somewhat in diameter adjacent to said closure seatportion 6 and is tapered toward the outer end 12, where it is againreduced and threaded to-accommodate a lock nut 13. The outer taperedportion 14 of the axle has substantially the same taper as the innertapered portion 6 that eooperates with the closure and the two ta- R. A.standard and provided on its top portion with a seat 2 for-the 8, 1928.Serial No. 304,760.

pered portions merge in a rounded shoulder portion 15.

Mounted on the outer tapered portion 14 of the axle is a double innerrace member or hearing cone 16 provided with a raceway 17 at its innerend and with a somewhat larger raceway 18 at its outer end. The bore ofsaid bearing cone is tapered to fit the tapered portion 14: of the axle.

Mounted on the two raceways are roller bearings, tapered rollers beingshown in the drawings. The rollers 19 of the innermost .series aresmaller than the rollers'20 of the outermost series. The cup or outerbearing member 21 of the outermost bearing is mounted in the journal boxland isseated against anfannular shoulder 22 in the journal box. The cupor outer bearing member 23 for the innermost series of rollers 19 ismounted in the journal boxand is positioned by means of an elongatedsleeve 24 on said closure member 9. Shims 25 interposed between the endof the journal box and the flange .10 of the closure member permitadjustment of the hearing. The bearings are held in place by means ofsaid lock nut 13 on the threaded end of the axle.

The center of the radial load on the bearings is indicated by a dash anddot line 30-30 passing through the center of the journal box seat andthe bearings. It will be noted that the larger rollers are closer tosaid line than the smaller rollers. ted lines IO-40 and 50 -50extending-vertically through the centers of the two rollersrespectively. The larger rollers, of course, have the greater loadcarrying capacity;-and their location as described, causes a greaterpart of the load to be applied to said larger rollers than is applied tothe smaller rollers. Accordingly, each bearing is able to function up toits capacity.

This is indicated by dot- Therconstruction is interchangeable with vtherein may then beinto place by means of the nut on the-end of theaxle. Likewise the journal box and bearings ma be easily removed afterthe bearing mem er is loosened from its tapered seat on the axle. Thetapered-axle construction reduces the sharpness of changes insectionordinarily resulting from reducing the axle diameter.

Obviously, numerous changes may be made without departing from myinvention and I do not wish to be limited to, the precise constructionshown.

What I claim is: I

1. A railway car axle bearing comprising a g'ournal box having a seat onwhich the load 0 the car rests, an axle extending into said journal box,and an antifriction bearing between said journal box and said axle, saidbearing comprislng two series of conical rollers and a single innerbearing member having two raceways thereon, the rollersv of theoutermost series being larger than those of the innermost series, saidrollers being disposed so that the vertical plane passing transk verselythrough the center of said seat is closer to the vertical plane passingthrough the middle of the larger series of rollers than to the verticalplane passing through the middle of the smalleflseries of rollers.

comprising a journal box, an axle having a tapered end portion extendinginto said journal box, an inner race memberhaving a tapered bore fittingthe tapered portion of said axle, said race member having two race-'ways for conical rollers, one of which has substantially the same taperas said tapered end portion of said axle, a series of conical rollers oneach raceway,and cups for said rollers mounted in said journal box.

3. A railway car axle bearing construction comprising a Journal box, anaxle having a tapered end portion extending into said journal box, aninner race member having a tap ered bore fitting the tapered portion ofsalcl axle, said race member having two raceways forconical rollers, aseries of conical rollers on each raceway, and cups for said rollersmounted in said journal box, the rollers of the outermostseries beinglarger than the rollers of the innermost series and said larger rollersbeing disposed so as to receive the larger portion of the load from saidjournal box.

Signed at Canton, Ohio, this 5th day of September, 1928.

WILLIAM L. SQRIBNER.

2. A railway car axle bearing construction I

